Video: How diabetes affects your blood sugar
Your body uses glucose for energy. Glucose metabolism requires insulin, a hormone produced by your pancreas. Watch this video to learn how normal glucose metabolism works and what happens when you have diabetes — a disease where your body can't produce enough insulin or use insulin properly.

Is an electric toothbrush better than a manual toothbrush?
It's possible to brush your teeth effectively with a manual toothbrush. However, an electric toothbrush's bristle movement might help you remove more plaque from your teeth and improve your gum health. And if you have arthritis or other conditions that make it difficult to brush well, an electric toothbrush can be a helpful alternative to a manual toothbrush. Learn more from Dr. Thomas Salinas, a Mayo Clinic prosthodontist.

First aid for fainting
Fainting occurs when your brain temporarily doesnâ€™t receive enough blood supply, causing you to lose consciousness. This loss of consciousness usually is brief but can be frightening. Fainting might have no medical significance, or the cause can be a serious disorder, often involving the heart. Learn what to do if you or someone else feel faint or experience fainting.